The phrase "a foreign element" is correct and usable in written English.
It can be used to describe something that is not native or is introduced from another place, often in contexts like science, culture, or social discussions.
Example: "The study revealed that the introduction of a foreign element into the ecosystem had significant effects on local species."
Alternatives: "an external factor" or "an alien component".
But, to Jobbik's extreme-right constituency, even someone who is one-twentieth Jewish is a "foreign element".
Doping of a foreign element in sp2 hybridized graphene lattice is of significant importance to tune the electrical and chemical properties.
One of the most effective ways to tune the physical and chemical properties of CNTs is to dope them with a foreign element, such as nitrogen.
In the 19th century Armenians struggled against the perception that they were a foreign element within the Ottoman Empire and that they would eventually betray it to form their own independent state.
"I liked the sensation of immersion in a foreign element, as if floating in a summer sea, only my face out of water, and a pleasant buzzing in my ears," Liebling later wrote.
Among the more vigorous opponents of that idea is Mr. Sharon, who defeated Mr. Barak for the premiership and who was quoted today in the newspaper Yediot Ahronot as saying, "No Zionist government will decide to transfer state land to a foreign element".
Meanwhile, no true patriot wishes to see any foreign element interfere.
Trump liked Hitler's idea of blaming a nation's problems on a criminal foreign element.
There was a distinctly foreign element in the 63rd Annual Peabody Awards for excellence in electronic media announced today, with prizes given to British, German and Japanese productions.
In 1915 the Ottoman government, regarding the Armenians as a dangerous foreign element, decided to deport the entire Armenian population of eastern Anatolia to Syria and Mesopotamia.
As a group these objects attest to centuries of cultural interchange, via trade, expansion and war, among Mesoamerican societies, though now and then a distinctly foreign element turns up.
